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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 433 · 40 sums
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The method (Know the totals): Acute < 90°, right = 90°, obtuse between 90° and 180°, straight = 180°. On a straight line: the two angles add up to 180°. In a triangle: the three angles add up to 180°. Around a point: 360°. Clock: each hour mark is 30° apart (360° ÷ 12).

NameDateTime takenScore ___ / 40
  1. 1.An angle measures 65°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  2. 2.Two angles of a triangle are 50° and 70°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 85° and 20°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  5. 5.An angle measures 15°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  6. 6.An angle measures 85°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  7. 7.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  10. 10.Two angles of a triangle are 50° and 110°. What is the third angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  13. 13.An angle measures 120°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  14. 14.Three angles meet at a point. Two of them are 80° and 90°. What is the third angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  17. 17.Two angles of a triangle are 90° and 55°. What is the third angle (in degrees)?
  18. 18.An angle measures 145°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  19. 19.Three angles meet at a point. Two of them are 130° and 160°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 120° and 70°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 50° and 60°. What is the third angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 100° and 60°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 100° and 170°. What is the third angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 140° and 140°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 100° and 50°. What is the third angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  40. 40.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right

Answer key

  1. Acute
  2. 60
  3. 75
  4. 120
  5. Acute
  6. Acute
  7. 60
  8. 180
  9. 30
  10. 20
  11. 150
  12. 90
  13. Obtuse
  14. 190
  15. 30
  16. 160
  17. 35
  18. Obtuse
  19. 70
  20. 30
  21. 120
  22. 90
  23. 170
  24. 50
  25. 45
  26. 70
  27. 80
  28. 75
  29. 155
  30. 170
  31. 200
  32. 45
  33. 90
  34. 170
  35. 80
  36. 210
  37. 85
  38. 120
  39. 55
  40. Right

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